Here's the changes for the 2010 Nissan Titan I made a new thread so it would show up on the home page. And here's what Nissan says about the Frontier.

2010 Nissan Frontier
The Nissan Frontier, a no-compromise pickup forged with premium hardware, extraordinary power and off-road athleticism, continues to be a leader in the mid-size truck segment. Updated just last year with a new front fascia, grille and headlight design and new machine-finished 16-inch wheels (PRO-4X) and new 18-inch aluminum-alloy wheels (LE), the changes for 2010 are limited to upgraded standard safety and security equipment and one new exterior color.

Frontier continues to offer an exceptional level of on- and off-road performance with the use of a 4.0-liter DOHC V6 engine with horsepower, torque, towing and payload specifications that are second-to-none in the mid-size truck class. A 152-horsepower 2.5-liter inline 4-cylinder engine is also available (King Cab only). With its strong performance, combined with good fuel mileage (17 city, 21 highway, King Cab 2WD), the Frontier is a fitting truck for work or play. Frontier is offered in both King Cab and Crew Cab body styles and in 4x2 and 4x4 driveline configurations. The 2010 Frontier goes on sale in August 2009.

Revisions for 2010 include:

•Standard side and curtain air bags on all models (4-cylinder and V6-equipped models)
•Standard Vehicle Dynamic Control (VDC) on all V6-equipped models
•5-speed automatic transmission now available on Frontier XE models
•2-wheel or 4-wheel Active Brake Limited Slip (ABLS) added as standard for all SE and LE V6 models
•Standard Hill Start Assist and Hill Descent Control now standard on all SE and LE 4WD automatic transmission-equipped models
•One new exterior color – Night Armor


You can see all the changes for all the models here. Nissan/Infiniti News Room